Dimya mimula Dall, Bartsch & Rehder, 1938

Raines, Bret & Huber, Markus, 2012, 3217, Zootaxa 3217, pp. 1-106 : 31

publication ID

1175­5334

DOI

https://doi.org/10.5281/zenodo.5250645

persistent identifier

https://treatment.plazi.org/id/03F187DA-6F49-FF92-A394-8813FE21FB93

treatment provided by

Felipe

scientific name

Dimya mimula Dall, Bartsch & Rehder, 1938
status

 

Dimya mimula Dall, Bartsch & Rehder, 1938 View in CoL

Figures 13 C–D, 14 E–F

Dimya mimula Dall et al., 1938: p. 78 View in CoL , pl. 19, figs. 1–2.

Dimya mimula Dall et al., 1938 View in CoL — Severns 2011: p. 454, pl. 207, fig. 2.

Material examined. Several single valves (4.5 to 6 mm) from EI (BK), plus the Hawaiian USNM holotype of D. mimula .

Diagnosis. Shell small, orbicular-elongate, inequivalve. RV attached to the substrate, no byssal foramen. LV sculptured with somewhat scaly radial riblets. Prodissoconch somewhat worn, but appears round and smooth. Interior of adult valves with finely denticulate margins. Two distantly placed elongate muscle scars, with the posterior bilobed. Yellowish white outside, whitish inside.

Remarks. Dimya mimula is an exceedingly rare species. As far as is known, this is the first time it has been recorded since its description from a single upper valve collected from a depth of 235 m.

The upper valves of the EI specimens match the USNM holotype of D. mimula ( Figs. 14 E–F) well and the largest valve (13.8 mm) also reaches nearly its 14 mm size. The radial surface sculpture is characteristic for this species. The bilobed posterior scars are well visible ( Figs. 13 D, 14 F). The rounded contour, yellowish color and notably the characteristic dense crenulations along the outer margins ( Fig. 13 D) are all consistent with D. mimula .

Habitat. Occasionally found at several locations around EI, in sand, from 30–80 m.

Distribution. Dimya mimula was previously only known from the Hawaiian Islands, but has now been extended to Easter Island— E2.

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Pectinida

Family

Dimyidae

Genus

Dimya

Loc

Dimya mimula Dall, Bartsch & Rehder, 1938

Raines, Bret & Huber, Markus 2012
2012
Loc

Dimya mimula

Severns, M. 2011: 454
2011
Loc

Dimya mimula

Dall, W. H. & Bartsch, P. & Rehder, H. A. 1938: 78
1938
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